The Aaronic prayer, also known as the Priestly Blessing, can be found in Numbers 6:24-26. Here is the Hebrew spelling of the prayer, along with the pronunciation guide in English and an English translation:
Hebrew: יְבָרֶכְךָ יְהוָה וְיִשְׁמְרֶךָ׃ יָאֵר יְהוָה פָּנָיו אֵלֶיךָ וִיחֻנֶּךָּ׃ יִשָּׂא יְהוָה פָּנָיו אֵלֶיךָ וְיָשֵׂם לְךָ שָׁלוֹם׃
Pronunciation: Y’va-re-che-cha Adonai v’yi-sh’me-re-cha Ya-eir Adonai pa-nav ei-le-cha vi-chu-ne-ka Yi-sa Adonai pa-nav ei-le-cha, v’ya-seim l’cha sha-lom
English translation: May the Lord bless you and keep you. May the Lord make his face shine on you and be gracious to you. May the Lord lift up his face toward you and give you peace.